Quick Answer
B105C means: B105C indicates a problem with the passenger airbag status indicator circuit.
Can I drive with B105C? Immediate attention is recommended to ensure passenger safety.
Common Questions
What does B105C mean and how does it affect my car?
The B105C code indicates an issue with the passenger airbag status indicator circuit, which could prevent the airbag from deploying in a crash. This significantly increases the risk of injury for passengers.
What are the most common causes of B105C and how much does it cost to fix?
Common causes include a faulty passenger airbag sensor, damaged wiring, or a defective airbag control module. Repair costs range from $100 to $500 depending on the specific issue.
Can I drive my car with B105C or should I stop immediately?
It is not safe to drive a vehicle with the B105C code, as it indicates a potential failure of the airbag system. You should stop driving and seek immediate repair to ensure passenger safety.
How can I diagnose B105C myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for DTCs, view freeze frame data, and check live data to understand what triggers the B105C code. Follow the app's prompts for further diagnostics.
What vehicles are most commonly affected by B105C?
The B105C code is frequently seen in models like the 2015-2018 Honda Accord, Honda Civic, and various other late model vehicles. Always check for any recalls related to the airbag system.
How can I prevent B105C from happening again?
Regular vehicle maintenance, including checking wiring and connectors, can help prevent the B105C code. Additionally, avoid installing aftermarket parts that may interfere with the airbag system.
What is B105C?
The B105C diagnostic trouble code (DTC) indicates a malfunction in the passenger airbag status indicator circuit. This code often appears in vehicles such as the 2015-2018 Honda Accord, but can also be found in other models. When the B105C code is triggered, it signifies that the vehicle's onboard diagnostic system has detected an issue with the airbag system's ability to properly communicate the status of the passenger airbag. In practical terms, this could mean that the passenger airbag may not deploy in the event of a collision, which poses a significant safety risk. The most common reasons for the B105C code include faulty wiring, a malfunctioning airbag control module, or a defective passenger airbag sensor. It's critical to address this code promptly, as ignoring it may lead to unsafe driving conditions. If your airbag warning light is illuminated, it's an immediate sign that your vehicle's safety features are compromised, and you should seek professional help as soon as possible. Understanding the implications of this code can help you make informed decisions regarding vehicle safety and repairs.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B105C is present:
- The airbag warning light remains illuminated, indicating a malfunction in the airbag system.
- You may notice that the passenger airbag status indicator shows 'OFF' even when a passenger is seated, suggesting a sensor issue.
- Inconsistent airbag deployment can occur, meaning the airbag may not deploy during an accident, leading to serious safety concerns.
- Unusual noises or malfunctions from the dashboard area when the vehicle is in use, suggesting electrical issues.
- The vehicle's onboard diagnostic system may fail to pass a safety inspection due to the presence of the B105C code.
Possible Causes
Most common causes of B105C (ordered by frequency):
- The most common cause is a faulty passenger airbag sensor, which accounts for about 40% of all B105C incidents due to wear and tear or electrical failure.
- Wiring issues, such as damaged or corroded wiring in the airbag circuit, can lead to signal loss, making up around 30% of the cases. Regular inspections can help prevent this.
- Defective airbag control modules, responsible for managing airbag deployment, are a less common cause but can be serious, accounting for about 20%. Ensuring proper electrical connections can mitigate this risk.
- Less common causes include software issues in the vehicle's computer system, which can affect airbag functionality.
- In rare cases, aftermarket modifications or repairs may interfere with the airbag system, leading to the B105C code.
B105C Repair Costs
Cost Breakdown by Repair Type
Passenger Airbag Sensor Replacement
Replacing the faulty passenger airbag sensor to restore proper functionality.
- Total: $150 - $300
- Success rate: 85%
Airbag Control Module Repair
Repairing or replacing the airbag control module if found to be defective.
- Total: $200 - $500
- Success rate: 90%
Wiring Repair
Repairing damaged wiring or connectors within the airbag circuit.
- Total: $100 - $200
- Success rate: 75%
Money-Saving Tips for B105C
- Start with the most common and least expensive repairs first
- Use GeekOBD APP to confirm diagnosis before replacing expensive parts
- Consider preventive maintenance to avoid future occurrences
- Compare prices for OEM vs aftermarket parts based on your needs
- Address the issue promptly to prevent more expensive secondary damage
Diagnostic Steps
Professional B105C Diagnosis Process
Follow these systematic steps to accurately diagnose B105C. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Perform an initial visual inspection of the airbag system components, looking for signs of damage or corrosion in wiring and connectors (5-10 minutes)
Step 1: Perform an initial visual inspection of the airbag system components, looking for signs of damage or corrosion in wiring and connectors (5-10 minutes).
Step 2: Step 2: Use the GeekOBD APP to conduct an OBD2 scan
Step 2: Use the GeekOBD APP to conduct an OBD2 scan. Retrieve all stored trouble codes and review freeze frame data to understand the context of the B105C code (10-15 minutes).
Step 3: Step 3: Test the passenger airbag sensor using a multimeter to ensure it’s functioning correctly
Step 3: Test the passenger airbag sensor using a multimeter to ensure it’s functioning correctly. Check for continuity and proper resistance values (20-30 minutes).
Step 4: Step 4: Conduct a system function test after any repairs to confirm that the airbag system is operational
Step 4: Conduct a system function test after any repairs to confirm that the airbag system is operational. Clear the codes and recheck for any new DTCs (10-15 minutes).
Step 5: Step 5: Perform a road test to verify that the airbag system is functioning properly under various driving conditions (15-20 minutes)
Step 5: Perform a road test to verify that the airbag system is functioning properly under various driving conditions (15-20 minutes).
Important Notes
- Always verify the repair with GeekOBD APP after completing diagnostic steps
- Clear codes and test drive to ensure the problem is resolved
- Address underlying causes to prevent code recurrence
Real Repair Case Studies
Case Study 1: Passenger Airbag Sensor Replacement in 2016 Honda Accord
Vehicle: 2016 Honda Accord, 75,000 miles
Problem: Customer reported that the airbag warning light was constantly on.
Diagnosis: After scanning with the GeekOBD APP, the B105C code was retrieved, indicating a problem with the passenger airbag status indicator.
Solution: Replaced the faulty passenger airbag sensor and cleared the DTCs.
Cost: $250 (sensor: $150, labor: $100)
Result: The airbag system was verified to be operational after repairs, and the warning light was cleared.
Case Study 2: Airbag Control Module Repair in 2017 Honda Civic
Vehicle: 2017 Honda Civic, 60,000 miles
Problem: Customer noticed the airbag warning light was on, indicating possible airbag issues.
Diagnosis: Diagnostic scan revealed B105C and confirmed a faulty airbag control module.
Solution: Replaced the airbag control module and reprogrammed it to the vehicle.
Cost: $450 (module: $300, labor: $150)
Result: Post-repair tests confirmed successful airbag deployment functionality, and the warning light was resolved.